Sanyo LCD-24XAZ10F, Service Manual

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Working principle analysis of the unit
RF signal from antenna is sent into
TUNER301
to be processed by HF-amplified and
frequency mixing, then IF signal is outputted to SWF
Z301
to be IF filtered to get ideal IF
characteristics, then the signal is sent to main chip
N101(RTD2674S)-27#,28#
to be
amplified by inline IF amplifier and synchronous demodulated to get CVBS.
Video and audio signal from AV, S-VIDEO , YPbPr, VGA , HDMI are sent to main chip
N101(RTD2674S)
directly.
Main chip
N101(RTD2674S)
is a special large scale IC with full functions, such as HDMI
interface process, video decoding, video switch selection, A/D and D/A transformation,
interleaved/successive scans, mode transformation, OSD and low-voltage difference
output process, etc.; furthermore, it also has functions of audio selection and process,
MCU, etc.; external video signal is processed by main chip
N101(RTD2674S)
, then 4
pairs of difference signals and one pair of clock signals are outputted to LCD to display;
external audio signal processed by main chip
N101(RTD2674S
) is sent to sound amplifier
N308(TDA7266SA)
to be amplified and then to speakers.